A4 Big data, data warehousing and data mining

What is the term used to describe the large amount of data generated every day?

• Small data

• Big data

• Medium data

• Tiny data

Which characteristic of big data refers to the speed at which data is generated?

• Volume

• Variety

• Velocity

• Storage

What does 'variety' in big data refer to?

• The speed of data generation

• The different types of data

• The amount of data

• The cost of data storage

Where are large datasets often stored for easy access and processing?

• In a drawer

• On a USB stick

• In the cloud

• On a floppy disk

What is a data warehouse primarily used for?

• Storing clothes

• Organising data by subject

• Cooking food

• Playing games

What does 'non-volatility' in a data warehouse mean?

• Data can be easily lost

• Data is stable and not easily changed

• Data is always changing

• Data is very small

What is the purpose of data mining?

• To dig for gold

• To discover patterns and trends in data

• To plant trees

• To build houses

Which of the following is a method used in data mining?

• Simple counting

• Sophisticated mathematical algorithms

• Basic addition

• Simple subtraction

What is the main benefit of data denormalisation in a data warehouse?

• It makes data more complex

• It simplifies data and improves performance

• It makes data harder to understand

• It increases data size

What type of queries are used in a data warehouse?

• Only planned queries

• Only ad hoc queries

• Both planned and ad hoc queries

• No queries at all